JP7220998B2 - Fireproof covering structure, fireproof covering material, and construction method for fireproof covering structure - Google Patents

Fireproof covering structure, fireproof covering material, and construction method for fireproof covering structure Download PDF

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JP7220998B2
JP7220998B2 JP2018110708A JP2018110708A JP7220998B2 JP 7220998 B2 JP7220998 B2 JP 7220998B2 JP 2018110708 A JP2018110708 A JP 2018110708A JP 2018110708 A JP2018110708 A JP 2018110708A JP 7220998 B2 JP7220998 B2 JP 7220998B2
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pair
steel frame
fireproof
fireproof covering
covering
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JP2019210786A (en
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俊之 阿部
健夫 小西
俊明 廣畑
慎平 山脇
玄宏 清水
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Sekisui House Ltd
Nichias Corp
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Sekisui House Ltd
Nichias Corp
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor

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  • Physics & Mathematics (AREA)
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  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
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Description

本発明は、耐火被覆構造に係り、より詳細には、耐火建築物の躯体柱を構成する鉄骨を耐火被覆材で被覆した耐火被覆構造、その耐火被覆構造を構成する耐火被覆材、並びに耐火被覆構造の施工方法に関する。 TECHNICAL FIELD The present invention relates to a fireproof covering structure, and more particularly, a fireproof covering structure in which a steel frame constituting a frame column of a fireproof building is covered with a fireproof covering material, a fireproof covering material constituting the fireproof covering structure, and a fireproof covering. It relates to construction methods of structures.

耐火建築物においては、躯体柱を構成する鉄骨の強度が火災の熱により低下することを防止するため、耐火被覆材で被覆されている。そのような鉄骨を耐火被覆材で被覆した耐火被覆構造の一例が、特許文献１に記載されている。特許文献１には、Ｈ形鋼のような鉄骨を耐火被覆材で挟んで被覆した耐火被覆構造が記載され、耐火被覆材には、Ｈ形鋼のフランジを受け入れる２列の切込部が形成されている。耐火被覆材がかかる構成を有することにより、耐火被覆材を鉄骨に簡単かつ確実に取り付けることができる。 In a fire-resistant building, the steel frame that constitutes the building frame is covered with a fire-resistant coating material in order to prevent the strength of the steel frame from being lowered by the heat of the fire. An example of a fireproof covering structure in which such a steel frame is covered with a fireproof covering material is described in Patent Document 1. Patent Document 1 describes a fire-resistant covering structure in which a steel frame such as an H-section steel is sandwiched between fire-resistant covering materials and coated, and the fire-resistant covering material has two rows of notches for receiving the flanges of the H-section steel. It is With such a configuration of the fireproof covering material, the fireproof covering material can be easily and reliably attached to the steel frame.

特開２０１７－３１７２８号公報JP-A-2017-31728

ところで、耐火被覆材に一対のフランジを受け入れる２列の切込部を形成しただけでは、躯体柱を構成するＨ形鋼の一対のフランジの間隔（ウエブの幅）が広くなると、Ｈ形鋼を被覆した耐火被覆材がＨ形鋼のウエブ表面から浮き上がったり、自重でずり下がったりたりするおそれがある。 By the way, if only two rows of cuts for receiving a pair of flanges are formed in the fireproof coating material, the H-section steel will not be able to be easily removed if the gap between the pair of flanges (the width of the web) of the H-section steel that constitutes the frame column is widened. There is a risk that the coated refractory coating material may rise from the surface of the H-section steel web or slide down under its own weight.

本発明は、上記の事情に鑑みてなされたものであり、躯体柱を構成する鉄骨から耐火被覆材が浮き上がったり、自重によりずり下がったりすることを防止することができる耐火被覆構造、その耐火被覆構造を構成する耐火被覆材、並びにその耐火被覆構造の施工方法を提供することを目的としている。 The present invention has been made in view of the above circumstances, and a fire-resistant coating structure capable of preventing the fire-resistant coating material from rising from the steel frame constituting the frame column or sliding down due to its own weight, and the fire-resistant coating It is an object of the present invention to provide a fire-resistant coating material that constitutes a structure and a construction method for the fire-resistant coating structure.

本発明の耐火被覆構造は、耐火建築物の躯体柱を構成する鉄骨と、前記鉄骨を被覆する耐火被覆材とを備えた耐火被覆構造であって、前記鉄骨は、一対のフランジと、前記一対のフランジを連結するウエブと、前記ウエブの両面に設けられ、前記一対のフランジと平行に延在する突条とを備え、前記耐火被覆材には、前記一対の耐火被覆材が前記鉄骨を両側から被覆したときに前記鉄骨の前記一対のフランジ及び前記突条をそれぞれ受け入れる３列の切込部が形成されていることを特徴としている。
本発明の耐火被覆構造によれば、鉄骨の一対のフランジと耐火被覆材の２列の切り込みとの間の摩擦に加えて、鉄骨の突条と耐火被覆材の３列目の切込部との間の摩擦により、耐火被覆材が浮き上がったり、自重によりずり下がったりすることが防止される。 The fireproof covering structure of the present invention is a fireproof covering structure comprising a steel frame constituting a frame column of a fireproof building and a fireproof covering material covering the steel frame, wherein the steel frame includes a pair of flanges and the pair of and a ridge provided on both sides of the web and extending parallel to the pair of flanges. Three rows of notches are formed to respectively receive the pair of flanges and the ridges of the steel frame when covered with a blank.
According to the fireproof coating structure of the present invention, in addition to the friction between the pair of flanges of the steel frame and the two rows of cuts in the fireproof coating, the protrusions of the steel frame and the third row of cuts in the fireproof coating Friction between the two prevents the refractory cladding from lifting or sliding down under its own weight.

本発明の耐火被覆材は、一対のフランジを連結するウエブの両方の主表面に、前記一対のフランジと平行に延在する突条を設けた耐火建築物の躯体柱を構成する鉄骨を被覆するための耐火被覆材であって、実質的に扁平な直方体形状を有し、前記直方体形状の主表面に、前記鉄骨に取り付けられたときに前記鉄骨の前記一対のフランジ及び前記突条をそれぞれ受け入れる３列の切込部が形成されていることを特徴としている。
本発明の耐火被覆材によれば、鉄骨のウエブに設けられた突条を受け入れる３列目の切込部を形成している。これにより、突条と３列目の切込部との摩擦が加わり、耐火被覆材が浮き上がったり、自重によりずり下がったりすることが防止される。 The fireproof coating material of the present invention coats a steel frame that constitutes a frame column of a fireproof building in which ridges extending parallel to the pair of flanges are provided on both main surfaces of a web that connects a pair of flanges. having a substantially flattened rectangular parallelepiped shape and having major surfaces of said rectangular parallelepiped shape respectively receiving said pair of flanges and said ridges of said steel frame when attached to said steel frame It is characterized by having three rows of notches.
According to the fireproof coating material of the present invention, the third row of cuts is formed to receive the ridges provided on the web of the steel frame. As a result, friction is added between the protrusions and the cut portions in the third row, and the refractory coating material is prevented from floating or sliding down due to its own weight.

本発明の耐火被覆構造の施工方法は、前記鉄骨に係止部材を取り付ける取付け工程と、前記鉄骨を本発明の耐火被覆材で被覆する被覆工程とを有し、前記被覆工程において、前記係止部材が前記耐火被覆材に突き刺さり、前記耐火被覆材を係止することを特徴としている。
本発明の耐火被覆構造の施工方法によれば、鉄骨に係止部材を取り付けるという簡単な工程を追加することにより、耐火被覆材が浮き上がったり、自重によりずり下がったりすることが防止される。 A construction method for a fire-resistant covering structure of the present invention includes an attaching step of attaching a locking member to the steel frame, and a covering step of covering the steel frame with the fire-resistant covering material of the present invention. A member is characterized in that it sticks into the refractory covering and locks the refractory covering.
According to the construction method of the fireproof covering structure of the present invention, by adding a simple step of attaching the locking member to the steel frame, the fireproof covering material is prevented from floating or sliding down due to its own weight.

本発明によれば、躯体柱を構成する鉄骨から耐火被覆材が浮き上がったり、自重によりずり下がったりすることが防止される。 According to the present invention, it is possible to prevent the fireproof coating material from rising from the steel frame forming the frame column or sliding down due to its own weight.

本発明の実施形態による耐火被覆構造の部分斜視図を示す。1 shows a partial perspective view of a refractory coated structure according to an embodiment of the invention; FIG. 図１に示した耐火被覆構造の横断面図を示す。2 shows a cross-sectional view of the refractory coating structure shown in FIG. 1; FIG. 本発明の実施形態による耐火被覆構造の部分斜視図を示す。1 shows a partial perspective view of a refractory coated structure according to an embodiment of the invention; FIG. 本発明の実施形態による耐火被覆構造における、係止部材が取り付けられた鉄骨の部分斜視図を示す。FIG. 4 shows a partial perspective view of a steel frame with a locking member attached in the fireproof cladding structure according to an embodiment of the present invention; 係止部材の斜視図を示す。Fig. 4 shows a perspective view of the locking member; 本発明の別の実施形態による耐火被覆構造における、係止部材が取り付けられた鉄骨の部分斜視図を示す。FIG. 13 shows a partial perspective view of a steel frame with locking members attached in a fireproof cladding structure according to another embodiment of the present invention; 本発明の実施形態による耐火被覆構造の施工方法の説明図を示す。FIG. 4 shows an explanatory diagram of a construction method of a fireproof covering structure according to an embodiment of the present invention;

（耐火被覆構造、鉄骨及び耐火被覆材）
図１～図５を参照して、本発明の実施形態による耐火被覆構造、鉄骨及び耐火被覆材を説明する。
図１に示すように、本発明の耐火被覆構造１は、耐火建築物の躯体柱を構成する鉄骨１０と、鉄骨１０を両側から被覆する一対の耐火被覆材２０とを備えている。 (Fireproof covering structure, steel frame and fireproof covering material)
A fireproof coating structure, a steel frame and a fireproof coating according to embodiments of the present invention will be described with reference to FIGS. 1 to 5. FIG.
As shown in FIG. 1, the fireproof covering structure 1 of the present invention comprises a steel frame 10 forming a frame column of a fireproof building, and a pair of fireproof covering materials 20 covering the steel frame 10 from both sides.

図１及び図２に示すように、鉄骨１０は、一対のフランジ１１と、一対のフランジ１１を連結するウエブ１２と、ウエブ１２の両面に設けられ、一対のフランジ１１と平行に延在する突条１３とを備えている。突条１３は、溶接によってウエブ１２に取り付けられている。ウエブ１２に対する突条１３の高さは、ウエブ１２に対する一対のフランジ１１の高さと同じであるのがよい。また、突条１３は、一対のフランジ１１の間の中央付近に一対のフランジ１１と平行に設けられるとよい。
鉄骨１０の一対のフランジ１１の間隔（ウエブ１２の幅）Ｗを広くした場合であっても、ウエブ１２に突条１３を設けたことにより、鉄骨１０のねじれ応力に対する強度の低下が抑制される。 As shown in FIGS. 1 and 2 , the steel frame 10 includes a pair of flanges 11 , a web 12 connecting the pair of flanges 11 , and projections provided on both sides of the web 12 and extending parallel to the pair of flanges 11 . Article 13. The ridges 13 are attached to the web 12 by welding. The height of the ridges 13 with respect to the web 12 is preferably the same as the height of the pair of flanges 11 with respect to the web 12 . Moreover, the ridge 13 is preferably provided near the center between the pair of flanges 11 in parallel with the pair of flanges 11 .
Even when the interval (width of the web 12) W between the pair of flanges 11 of the steel frame 10 is widened, the reduction in strength against torsional stress of the steel frame 10 is suppressed by providing the ridges 13 on the web 12. .

図３に示すように、耐火被覆材２０は、実質的に扁平な直方体形状を有する。直方体形状の主表面２０ａには、耐火被覆材２０が鉄骨１０を両側から被覆したときに鉄骨１０の一対のフランジ１１及び突条１３をそれぞれ受け入れる３列の切込部２１及び２２が形成されている。耐火被覆材２０の切込部２１及び２２の位置及び深さは、鉄骨１０のフランジ１１及び突条１３の位置及び高さに合わせて設定するとよい。耐火被覆材２０は、ロックウールのような、耐火性能を有する難燃材をフェルト状にして形成するとよい。 As shown in FIG. 3, the refractory covering 20 has a substantially flat rectangular parallelepiped shape. The rectangular parallelepiped main surface 20a is formed with three rows of notches 21 and 22 for respectively receiving the pair of flanges 11 and the ridges 13 of the steel frame 10 when the steel frame 10 is covered with the fireproof covering material 20 from both sides. there is The positions and depths of the cuts 21 and 22 of the fireproof covering material 20 are preferably set according to the positions and heights of the flanges 11 and the ridges 13 of the steel frame 10 . The fire-resistant covering material 20 is preferably formed by making a flame-retardant material having fire-resistant performance, such as rock wool, into a felt.

図１及び図２に示すように、耐火被覆材２０が鉄骨１０を両側から被覆したときに、鉄骨１０のフランジ１１が、耐火被覆材２０の両側付近に形成された切込部２１に受け入れられ、鉄骨１０の突条１３が、耐火被覆材２０の中央付近に形成された切込部２２に受け入れられる。これにより、鉄骨１０の一対のフランジ１１と耐火被覆材２０の２列の切込部と２１の間の摩擦に加えて、鉄骨１０の突条１３と耐火被覆材２０の３列目の切込部２２との間の摩擦により、耐火被覆材２０の浮き上がり、及び自重によるずり下がりが防止される。 As shown in FIGS. 1 and 2, when the steel frame 10 is covered with the fire-resistant coating material 20 from both sides, the flanges 11 of the steel frame 10 are received in the notches 21 formed near both sides of the fire-resistant coating material 20. , the ridge 13 of the steel frame 10 is received in the notch 22 formed near the center of the refractory covering 20 . As a result, in addition to the friction between the pair of flanges 11 of the steel frame 10 and the two rows of cut portions and 21 of the fireproof coating material 20, the protrusions 13 of the steel frame 10 and the third line of cuts of the fireproof coating material 20 Friction with the portion 22 prevents the refractory coating 20 from floating and sliding down due to its own weight.

鉄骨１０をウエブ１２の両側から挟み込んで被覆した一対の耐火被覆材２０は、固定部材（かすがい金具）３０によってウエブ１２の両面方向から挟み込まれて固定されている。
なお、固定部材は、かすがい金具に限定されない。固定部材は、例えば、一対の耐火被覆材２０の両方にまたがって打ち込まれたステープルでもよいし、鉄骨１０を被覆した一対の耐火被覆材２０の外周に巻き付けられた金属帯でもよい。 A pair of fireproof coating materials 20 covering the steel frame 10 from both sides of the web 12 are sandwiched and fixed from both sides of the web 12 by fixing members (bracing fittings) 30 .
Note that the fixing member is not limited to the fitting fitting. The fixing member may be, for example, a staple driven across both of the pair of fireproof covering materials 20, or a metal band wound around the outer periphery of the pair of fireproof covering materials 20 covering the steel frame 10.

さらに、耐火被覆材２０が浮き上がったり、自重によってずり下がったりすることを効果的に防止するために、図２中に破線で示したように、鉄骨１０のウエブ１２に係止部材４０が取り付けられている。係止部材４０は、鉄骨１０を被覆した耐火被覆材２０に突き刺さり、耐火被覆材２０を係止する。 Furthermore, in order to effectively prevent the refractory coating material 20 from floating or sliding down due to its own weight, a locking member 40 is attached to the web 12 of the steel frame 10 as indicated by the broken line in FIG. ing. The locking member 40 sticks into the fireproof coating material 20 covering the steel frame 10 and locks the fireproof coating material 20 .

図４に示すように、係止部材４０は、鉄骨１０のウエブ１２に形成された開口の周縁１４に係止されている。これにより、係止部材４０をウエブ１２に容易に取り付けることができる。 As shown in FIG. 4 , the locking member 40 is locked to the peripheral edge 14 of the opening formed in the web 12 of the steel frame 10 . This makes it possible to easily attach the locking member 40 to the web 12 .

図５に示すように、係止部材４０は、連結部４２で互いに連結された一対のユニット４１ａ及び４１ｂを有する。一対のユニット４１ａ及び４１ｂは、互いに背中合わせとなるように連結部４２において折り返されて、開口の周縁１４を両側から挟み込む。
一対のユニット４１ａ及び４１ｂの各々は、連結部４２で他方のユニットと連結された基部４３と、基部４３から立ち上がり、耐火被覆材２０に突き刺さる突設部４４と、突設部４４に形成された抜け止め部（かえし）４５とを有する。突設部４４が耐火被覆材２０に突き刺さることによって、耐火被覆材２０のずれが効果的に防止される。さらに、抜け止め部４５が耐火被覆材２０と係合することによって、耐火被覆材２０の浮き上がりが効果的に防止される。 As shown in FIG. 5, the locking member 40 has a pair of units 41a and 41b connected to each other by a connecting portion 42. As shown in FIG. The pair of units 41a and 41b are folded back at the connecting portion 42 so as to be back-to-back, and sandwich the peripheral edge 14 of the opening from both sides.
Each of the pair of units 41a and 41b includes a base portion 43 connected to the other unit by a connecting portion 42, a protruding portion 44 rising from the base portion 43 and sticking into the fireproof coating 20, and a protruding portion 44 formed on the protruding portion 44. It has a retainer (barb) 45 . The protruding portion 44 sticking into the fireproof covering material 20 effectively prevents the fireproof covering material 20 from slipping. Furthermore, the engagement of the retaining portion 45 with the fireproof covering material 20 effectively prevents the fireproof covering material 20 from rising.

係止部材４０の突設部４４は、鉄骨１０のウエブ１２の表面と実質的に平行な平らな先端を有する。鉄骨１０を耐火被覆材２０で被覆する際に、作業者が耐火被覆材２０を手で押さえ付けると、係止部材４０の突設部４４の先端が、耐火被覆材２０を貫通することがある。係止部材４０の突設部４４の先端を鋭利でなくしたので、突設部４４の先端が耐火被覆材２０を貫通しても、作業者の手に損傷を与えることを防止することができる。
なお、係止部材４０の突設部４４の先端は、湾曲形状を有してもよい。 The projecting portion 44 of the locking member 40 has a flat tip substantially parallel to the surface of the web 12 of the steel frame 10 . When covering the steel frame 10 with the fireproof covering material 20, if the operator presses down the fireproof covering material 20 by hand, the tip of the projecting part 44 of the locking member 40 may penetrate the fireproof covering material 20. . Since the tip of the projecting portion 44 of the locking member 40 is not sharp, even if the tip of the projecting portion 44 penetrates the fireproof covering material 20, it is possible to prevent damage to the hands of the operator. .
In addition, the tip of the projecting portion 44 of the locking member 40 may have a curved shape.

また、図６に示すように、係止部材４０ａをウエブ１２に接着剤で貼り付けてもよい。係止部材４０ａは、例えば、図５に示した係止部材４０の一対のユニット４１ａ及び４１ｂの一方と同一の形状を有するとよい。 Alternatively, as shown in FIG. 6, the locking member 40a may be attached to the web 12 with an adhesive. The locking member 40a may have, for example, the same shape as one of the pair of units 41a and 41b of the locking member 40 shown in FIG.

（耐火被覆構造の施工方法）
次に、図１、図４及び図７を参照して、本発明の実施形態による耐火被覆構造の施工方法を説明する。
耐火被覆構造の施工にあたり、まず、図４に示すように、鉄骨１０に係止部材４０を取り付ける。なお、図６に示すように、鉄骨１０のウエブ１２に係止部材４０ａを接着剤で取り付けてもよい。
次いで、図７に示すように、鉄骨１０をウエブ１２の両面側から一対の耐火被覆材２０で被覆する。被覆工程において係止部材４０が耐火被覆材２０に突き刺さり、耐火被覆材２０を係止する。
さらに、図１に示すように、一対の耐火被覆材２０を、固定部材（かすがい金具）３０でウエブ１２の両面方向から挟み込んで固定する。
る。
このように、鉄骨１０に係止部材４０を取り付けるという簡単な工程を追加することによって、耐火被覆材２０が浮き上がったり、自重によりずり落ちたりすることが効果的に防止される。 (Construction method for fireproof covering structure)
Next, with reference to FIGS. 1, 4 and 7, a construction method for a fireproof coating structure according to an embodiment of the present invention will be described.
In constructing the fireproof covering structure, first, as shown in FIG. Incidentally, as shown in FIG. 6, the locking member 40a may be attached to the web 12 of the steel frame 10 with an adhesive.
Next, as shown in FIG. 7, the steel frame 10 is covered with a pair of refractory coating materials 20 from both sides of the web 12 . In the covering process, the locking member 40 sticks into the fireproof covering material 20 and locks the fireproof covering material 20 .
Further, as shown in FIG. 1, a pair of fireproof coating materials 20 are fixed by sandwiching them from both sides of the web 12 with fixing members (bracing fittings) 30 .
be.
By adding the simple step of attaching the locking member 40 to the steel frame 10 in this manner, the fireproof covering material 20 is effectively prevented from floating up or slipping down due to its own weight.

以上、本発明の実施形態を説明したが、本発明は、上述した実施形態に限定されるものではなく、本発明の範囲で種々の変更実施が可能である。上述した実施形態では、鉄骨のウエブの開口の周縁に係止部材を係止することによって、係止部材を鉄骨に取り付けたが、本発明では、係止部材の取付け方法はこれに限定されない。例えば、係止部材を、溶接によりウエブに取り付けてもよいし、接着剤によりウエブに取り付けてもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. In the embodiment described above, the locking member is attached to the steel frame by locking the locking member to the periphery of the opening of the web of the steel frame, but in the present invention, the mounting method of the locking member is not limited to this. For example, the locking member may be attached to the web by welding or may be attached to the web by an adhesive.

１ 耐火被覆構造
１０ 鉄骨
１１ フランジ
１２ ウエブ
１３ 突条
１４ 開口の周縁
２０ 耐火被覆材
２０ａ 主表面
２１，２２ 切込部
３０ 固定部材
４０，４０ａ 係止部材
４１ａ，４１ｂ ユニット
４２ 連結部
４３ 基部
４４ 突設部
４５ 抜け止め部（かえし） Reference Signs List 1 Fireproof covering structure 10 Steel frame 11 Flange 12 Web 13 Projection 14 Peripheral edge of opening 20 Fireproof covering material 20a Main surface 21, 22 Notch 30 Fixing member 40, 40a Locking member 41a, 41b Unit 42 Connecting part 43 Base 44 Protrusion Set portion 45 Retaining portion (barb)

Claims (7)

耐火建築物の躯体柱を構成する鉄骨と、前記鉄骨を被覆する一対の耐火被覆材とを備えた耐火被覆構造であって、
前記鉄骨は、一対のフランジと、
前記一対のフランジを連結するウエブと、
前記ウエブの両面に設けられ、前記一対のフランジと平行に延在する平板状の突条とを備え、
前記一対の耐火被覆材の各々には、前記一対の耐火被覆材が前記鉄骨を両側から被覆したときに前記鉄骨の前記一対のフランジ及び前記突条をそれぞれ受け入れる３列の切込部が形成され、
前記ウエブに取り付けられ、前記鉄骨を被覆した前記耐火被覆材に前記ウエブ側から突き刺さり、かつ前記耐火被覆材を貫通していない、前記耐火被覆材を係止する係止部材を更に備え、
前記係止部材は、耐火被覆材に突き刺さる突設部と、突設部に形成された抜け止め部とを有する
ことを特徴とする、耐火被覆構造。 A fireproof covering structure comprising a steel frame constituting a frame column of a fireproof building and a pair of fireproof covering materials covering the steel frame,
The steel frame includes a pair of flanges,
a web connecting the pair of flanges;
Flat plate-shaped ridges provided on both sides of the web and extending parallel to the pair of flanges,
Each of the pair of refractory covering members is formed with three rows of notches for respectively receiving the pair of flanges and the ridges of the steel frame when the pair of refractory covering members cover the steel frame from both sides. ,
further comprising a locking member that is attached to the web, pierces the fireproof covering material covering the steel frame from the web side, and does not penetrate the fireproof covering material, and locks the fireproof covering material,
The locking member has a protruding portion that pierces the fireproof covering material, and a retaining portion formed on the protruding portion.
A fireproof covering structure characterized by: 前記鉄骨の前記ウエブに開口が形成され、
前記係止部材は、前記開口の周縁に係止されている
ことを特徴とする、請求項１記載の耐火被覆構造。 an opening is formed in the web of the steel frame;
2. The fireproof covering structure according to claim 1 , wherein said locking member is locked to the periphery of said opening. 前記係止部材は、連結部で互いに連結された一対のユニットを有し、
前記一対のユニットは、前記連結部において折り返されて、前記開口の周縁を両側から挟み、
前記連結部は、前記開口の前記周縁に係止されている
ことを特徴とする、請求項２記載の耐火被覆構造。 The locking member has a pair of units connected to each other by a connecting portion,
The pair of units are folded back at the connecting portion to sandwich the periphery of the opening from both sides,
3. The fireproof covering structure according to claim 2 , wherein said connecting portion is engaged with said peripheral edge of said opening. 前記一対のユニットの各々は、
前記連結部で他方のユニットと連結された基部と、
前記基部から立ち上がり、前記耐火被覆材に突き刺さる突設部と、
前記突設部に形成された抜け止め部と
を有することを特徴とする、請求項３記載の耐火被覆構造。 each of the pair of units comprising:
a base connected to the other unit at the connecting portion;
a protruding portion that rises from the base and pierces the fireproof covering;
4. The fireproof covering structure according to claim 3 , further comprising a retaining portion formed on said projecting portion. 前記係止部材の前記突設部は、前記鉄骨の前記ウエブの表面と実質的に平行な、又は湾曲した先端を有する
ことを特徴とする、請求項４記載の耐火被覆構造。 5. The refractory coated structure according to claim 4 , wherein the protruding portion of the locking member has a tip that is substantially parallel or curved to the surface of the web of the steel frame. 一対の耐火被覆材を施工する耐火被覆構造の施工方法であって、
前記耐火被覆材は、一対のフランジを連結するウエブの両方の主表面に、前記一対のフランジと平行に延在する平板状の突条を設けた耐火建築物の躯体柱を構成する鉄骨を被覆する耐火被覆材であって、
実質的に扁平な直方体形状を有し、
前記直方体形状の主表面に、前記鉄骨に取り付けられたときに前記鉄骨の前記一対のフランジ及び前記突条をそれぞれ受け入れる３列の切込部が形成され、
前記鉄骨に係止部材を取り付ける取付け工程と、
前記鉄骨を前記一対の耐火被覆材で被覆する被覆工程とを有し、
前記被覆工程において、前記係止部材が前記耐火被覆材に突き刺さり、前記耐火被覆材を係止し、
前記取付け工程において、前記係止部材は、耐火被覆材に突き刺さる突設部と、突設部に形成された抜け止め部とを有し、
前記被覆工程において、前記係止部材が前記耐火被覆材に前記ウエブ側から突き刺さり、かつ前記耐火被覆材を貫通せずに、前記耐火被覆材を係止する
ことを特徴とする、耐火被覆構造の施工方法。 A construction method for a fireproof covering structure for constructing a pair of fireproof covering materials,
The refractory covering material covers the steel frame constituting the skeleton column of the refractory building provided with flat ridges extending parallel to the pair of flanges on both main surfaces of the web connecting the pair of flanges. A refractory coating that
having a substantially flat rectangular parallelepiped shape,
Three rows of notches are formed on the main surface of the rectangular parallelepiped shape to respectively receive the pair of flanges and the ridges of the steel frame when attached to the steel frame,
an attaching step of attaching a locking member to the steel frame;
and a covering step of covering the steel frame with the pair of fireproof covering materials,
In the covering step, the locking member pierces the fireproof covering material to lock the fireproof covering material,
In the mounting step, the locking member has a protruding portion that pierces the fireproof coating and a retaining portion formed on the protruding portion,
In the covering step, the locking member sticks into the fireproof covering material from the web side and locks the fireproof covering material without penetrating the fireproof covering material.
A construction method for a fireproof covering structure, characterized by: 前記鉄骨の前記ウエブに開口が形成されており、
前記取付け工程において、前記係止部材は、連結部で互いに連結された一対のユニットを有し、
前記一対のユニットは、前記連結部において折り返されて、前記開口の周縁を両側から挟み、
前記連結部は、前記ウエブの前記開口の前記周縁に係止される
ことを特徴とする、請求項６記載の耐火被覆構造の施工方法。 An opening is formed in the web of the steel frame,
In the mounting step, the locking member has a pair of units connected to each other by a connecting portion,
The pair of units are folded back at the connecting portion to sandwich the periphery of the opening from both sides,
7. The method of constructing a fireproof covering structure according to claim 6 , wherein said connecting portion is engaged with said peripheral edge of said opening of said web.
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Citations (2)

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JP2008069605A (en) 2006-09-15 2008-03-27 Nippon Steel Corp Reinforcement structure of h-shaped cross section steel material and reinforcement method
JP2017031728A (en) 2015-08-04 2017-02-09 ニチアス株式会社 Fire-resistant covering material, and manufacturing method thereof

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JPH0528806U (en) * 1991-09-19 1993-04-16 株式会社長谷工コーポレーシヨン Fireproof coating structure for steel members
JP3240600B2 (en) * 1993-09-08 2001-12-17 清水建設株式会社 Rock wool coating structure of steel frame and coating method

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JP2008069605A (en) 2006-09-15 2008-03-27 Nippon Steel Corp Reinforcement structure of h-shaped cross section steel material and reinforcement method
JP2017031728A (en) 2015-08-04 2017-02-09 ニチアス株式会社 Fire-resistant covering material, and manufacturing method thereof

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